Torque limiter device

Abstract

A torque limiter device includes a flywheel, a clutch disc assembly, a cover plate, a pressure ring, a plurality of friction members, a plurality of rivets and a cone spring. Each of the rivets is fixed to the cover plate and includes a first head portion disposed axially between a disc portion and the cover plate. The cone spring is disposed axially between the first head portions and the pressure ring in a compressed state.

The invention claimed is: 
     
       1. A torque limiter device configured to limit torque to be transmitted from an engine to a transmission, the torque limiter device comprising:
 a drive member including a disc portion being configured to receive torque inputted thereto from the engine, and an annularly protruding portion axially protruding from an outer periphery of the disc portion; 
 a cover member having an annular shape, the cover member being fixed to the annularly protruding portion; 
 a pressure member having an annular shape, the pressure member being disposed axially between the disc portion and the cover member, the pressure member being disposed unitarily rotatably and axially movably with respect to the cover member; 
 a friction part being disposed between the cover member and the pressure member, the friction part being disposed slidably with at least one of the cover member and the pressure member; 
 an input-side member being disposed unitarily rotatably with the friction part; 
 an output-side member being configured to transmit torque to the transmission; 
 a damper mechanism being configured to couple elastically the input-side member and the output-side member in a rotational direction; 
 a support member being fixed to the cover member, the support member including a first head portion being disposed axially between the disc portion and the cover member; and 
 an elastic member having an annular shape, the elastic member being disposed axially between the first head portion and the pressure member in a compressed state, 
 the disc portion includes a surface and an annular recess, the surface facing the pressure member and being axially away from the pressure member, the surface being in an inner periphery side of the annular recess and axially opposing the friction part, the annular recess being axially dented from the surface, the first head portion being arranged to be at least partially in the annular recess. 
 
     
     
       2. The torque limiter device recited in  claim 1 , wherein
 the support is disposed axially away from the disc portion. 
 
     
     
       3. The torque limiter device recited in  1 , wherein
 the first head portion is disposed radially inwards of the annularly protruded portion. 
 
     
     
       4. The torque limiter device recited in  1 , wherein
 the annularly protruded portion includes an accommodating recess, which is dented radially outwards for allowing the first head portion to be at least partially disposed therein. 
 
     
     
       5. The torque limiter device recited in  claim 1 , wherein
 the support member includes a trunk portion being disposed axially between the cover member and the disc portion, 
 the first head portion is formed on a disc portion side end of the trunk portion, and 
 the first head portion has an outer diameter greater than an outer diameter of the trunk portion. 
 
     
     
       6. The torque limiter device recited in  claim 5 , wherein
 the cover member includes a hole, 
 the support member includes an inserted portion being formed on an end of the trunk portion, and a second head portion being formed on an end of the inserted portion on an opposite side of the trunk portion, 
 the second head portion has an outer diameter greater than an outer diameter of the inserted portion, 
 the inserted portion is inserted into the hole, and 
 the cover member is interposed and held between the trunk portion and the second head portion of the support member. 
 
     
     
       7. The torque limiter device recited in  claim 1 , wherein
 the pressure member is unitarily rotatably and axially movably supported by the support member with respect to the cover member. 
 
     
     
       8. The torque limiter device recited in  claim 1 , wherein
 the cover member includes a main body portion having an annular shape, and a tubular portion extending from an inner periphery of the main body portion in a direction opposite to the disc portion, and 
 the main body portion is configured to allow the support member to be fixed thereto. 
 
     
     
       9. The torque limiter device recited in  claim 8 , wherein
 the damper mechanism is disposed radially inwards of the tubular portion. 
 
     
     
       10. The torque limiter device recited in  claim 9 , wherein
 the friction part includes a plurality of friction members which are circumferentially aligned, 
 the input side member includes a plurality of accommodating holes which are circumferentially aligned, and 
 the plurality of friction members includes a first friction member being inserted into the accommodating hole.